太阳风和质子密度变率的广义热统计和小波分析
Generalized Thermostatistics and Wavelet Analysis of the Solar Wind and Proton Density Variability
摘要：
本文基于广义热统计方法，分析了太阳风速度和质子密度的概率密度函数，并将理论结果与观测数据进行了比较。分析的时间序列来自SOHO卫星任务，其中每小时对测量值进行采样。我们在调查中提供了两年不同的太阳活动数据：（a）中等活动（MA）时期（1997年）和（b）高活动（HA）时期（2000年）。对于MA阶段，实验结果与GT模型吻合较好。对于HA期间，实验和理论PDF之间的协议是相当不错的，但观察到一些扭曲，可能是由于湍流过程的间歇性特征。作为一种补充分析，全球小波谱（GWS），得到允许的主要时间变化尺度的周期和随机方面的非线性太阳风变化的特征进行了讨论。
英文摘要：
In this paper, we analyze the probability density function (PDF) of solar wind velocity and proton density, based on generalized thermostatistics (GT) approach, comparing theoretical results with observational data. The time series analyzed were obtained from the SOHO satellite mission where measurements were sampled every hour. We present in the investigations data for two years of different solar activity: (a) moderate activity (MA) period (1997) and (b) high activity (HA) period (2000). For the MA period, the results show good agreement between experimental data and GT model. For the HA period, the agreement between experimental and theoretical PDFs was fairly good, but some distortions were observed, probably due to intermittent characteristics of turbulent processes. As a complementary analysis, the Global Wavelet Spectrum (GWS) was obtained allowing the characterization of the predominant temporal variability scales for both the periods and the stochastics aspects of the nonlinear solar wind variability are discussed.
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